The Ford Barn

firerod · 02-21-2016, 10:35 PM

I have done a search and read several posts on this subject. Some say I need to bench bleed others say it's not needed. Please help. I have a new '40 style master cylinder from C&G Ford. Should I bench bleed or not?

texas webb · 02-21-2016, 10:43 PM

I do before install.

Lawson Cox · 02-21-2016, 10:56 PM

I've never done it.

Talkwrench · 02-21-2016, 11:44 PM

NO generally not on a single system , DO not push the pedal all the way to the floor when bleeding when you install.. Also speed bleeders are your best friend right about now.

willowbilly3 · 02-22-2016, 06:42 AM

Whether you really NEED to or not, I still do. It's just less air to pump out through the lines.

moefuzz · 02-22-2016, 10:32 AM

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I never have.
As soon as it's installed, you fill it and start pumping fluid thru.
Bench bleed seems redundant.

jacob smith · 02-22-2016, 09:52 PM

The one I got from Napa needed to be

Jack E/NJ · 02-22-2016, 09:58 PM

No. Lines & wheel cylinders are prolly gonna be full of air anyway. Why bother!?

Jack E/NJ

Bored&Stroked · 02-22-2016, 10:00 PM

I've never bench bled a single one - on any car. Seems to me to be great way to get brake fluid all over the engine compartment (or frame) - that crap eats the heck out of any paint you might have.

Not saying it is a bad idea, but by the time I'm putting in a new master cylinder, I've usually screwed with the brake cylinders or calipers . . . but maybe that is just me!

It can't hurt yah - but might make a good mess!

JSeery · 02-22-2016, 10:29 PM

I don't bench bled them.

cmbrucew · 02-22-2016, 11:00 PM

Some master/slave cylinder with a remote resiovour are an example of a system that needs to be bench bled. As was used on B 25 towmotor clutch.
Bruce

firerod · 02-23-2016, 09:47 AM

Thanks everyone. I am going to install it with out bench bleeding.

39topless · 02-23-2016, 11:04 AM

After you install and fill with fluid, leave the cap off and gently press on the brake pedal a few times. You will see bubbles escaping and that should "bleed" the cylinder just fine. Then do the lines.

02-21-2016, 10:35 PM	#1
firerod Senior Member Join Date: May 2010 Location: Lakewood, CO Posts: 413	Do I need to bench bleed '40 master cylinder I have done a search and read several posts on this subject. Some say I need to bench bleed others say it's not needed. Please help. I have a new '40 style master cylinder from C&G Ford. Should I bench bleed or not?

02-21-2016, 10:43 PM	#2
texas webb Senior Member Join Date: Dec 2010 Location: San Antonio Texas Posts: 636	Re: Do I need to bench bleed '40 master cylinder I do before install.

02-21-2016, 10:56 PM	#3
Lawson Cox Senior Member Join Date: May 2010 Location: Above the gnat line in Georgia Posts: 7,009	Re: Do I need to bench bleed '40 master cylinder I've never done it. __________________ Life is like a roll of toilet paper. The closer to the end, the faster it goes. It is better to be seen, than viewed. "We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm".

02-21-2016, 11:44 PM	#4
Talkwrench Senior Member Join Date: Aug 2012 Location: Perth, Western Australia Posts: 2,687	Re: Do I need to bench bleed '40 master cylinder NO generally not on a single system , DO not push the pedal all the way to the floor when bleeding when you install.. Also speed bleeders are your best friend right about now. __________________ *"Came too close to dying to stop living now!"*

02-22-2016, 06:42 AM	#5
willowbilly3 Senior Member Join Date: Sep 2011 Location: Black Hills, SD Posts: 577	Re: Do I need to bench bleed '40 master cylinder Whether you really NEED to or not, I still do. It's just less air to pump out through the lines.

02-22-2016, 10:32 AM	#6
moefuzz Senior Member Join Date: May 2010 Location: Under A Clean V8 Posts: 228	Re: Do I need to bench bleed '40 master cylinder Sponsored Links (Register now to hide all advertisements) I never have. As soon as it's installed, you fill it and start pumping fluid thru. Bench bleed seems redundant.

02-22-2016, 09:52 PM	#7
jacob smith Senior Member Join Date: Nov 2014 Location: New ringgold pa Posts: 311	Re: Do I need to bench bleed '40 master cylinder The one I got from Napa needed to be __________________ Ford

02-22-2016, 09:58 PM	#8
Jack E/NJ Senior Member Join Date: May 2010 Posts: 2,173	Re: Do I need to bench bleed '40 master cylinder No. Lines & wheel cylinders are prolly gonna be full of air anyway. Why bother!? Jack E/NJ

02-22-2016, 10:00 PM	#9
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,064	Re: Do I need to bench bleed '40 master cylinder I've never bench bled a single one - on any car. Seems to me to be great way to get brake fluid all over the engine compartment (or frame) - that crap eats the heck out of any paint you might have. Not saying it is a bad idea, but by the time I'm putting in a new master cylinder, I've usually screwed with the brake cylinders or calipers . . . but maybe that is just me! It can't hurt yah - but might make a good mess!

02-22-2016, 10:29 PM	#10
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: Do I need to bench bleed '40 master cylinder I don't bench bled them.

02-22-2016, 11:00 PM	#11
cmbrucew Senior Member Join Date: Dec 2010 Location: North of sandy ago, CA. Posts: 2,064	Re: Do I need to bench bleed '40 master cylinder Some master/slave cylinder with a remote resiovour are an example of a system that needs to be bench bled. As was used on B 25 towmotor clutch. Bruce __________________ Works good Lasts long time

02-23-2016, 09:47 AM	#12
firerod Senior Member Join Date: May 2010 Location: Lakewood, CO Posts: 413	Re: Do I need to bench bleed '40 master cylinder Thanks everyone. I am going to install it with out bench bleeding.

02-23-2016, 11:04 AM	#13
39topless Senior Member Join Date: Sep 2013 Posts: 1,027	Re: Do I need to bench bleed '40 master cylinder After you install and fill with fluid, leave the cap off and gently press on the brake pedal a few times. You will see bubbles escaping and that should "bleed" the cylinder just fine. Then do the lines.